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Collection System Collaborative Benchmarking Group
<br />Best Practices for Sanitary Sewer Overflow (SSO) Prevention and
<br />Response Plan
<br />TABLE 'B'
<br />ESTIMATED SSO FLOW OUT OF M/H WITH COVER REMOVED
<br />24" FRAME36" FRAME
<br />WaterMin. SewerWaterMin. Sewer
<br />Height aboveS S O FLOWsize in whichHeight aboveS S O FLOWsize in which
<br />M/H framethese flowsM/H framethese flows
<br />QQ
<br /> in inchesin gpmin MGDare possiblein inchesin gpmin MGDare possible
<br />HH
<br /> 1/8280.04 1/8490.07
<br /> 1/4620.09 1/41110.16
<br /> 3/81110.16 3/81870.276"
<br /> 1/21600.23 1/22710.39
<br /> 5/82150.316" 5/83610.528"
<br /> 3/43540.518" 3/44580.66
<br /> 7/85690.8210" 7/85560.810"
<br />17991.1512"16600.9512"
<br />1 1/81,0351.491 1/81,0351.49
<br />1 1/41,3401.9315"1 1/41,4862.1415"
<br />1 3/81,6602.391 3/81,9512.81
<br />1 1/21,9862.861 1/22,4243.4918"
<br />1 5/82,3963.4518"1 5/82,9034.18
<br />1 3/42,7994.031 3/43,3824.87
<br />1 7/83,1324.511 7/83,9175.6421"
<br />23,4444.9621"24,4586.42
<br />2 1/83,7505.42 1/85,0007.224"
<br />2 1/43,9865.742 1/45,5568
<br />2 3/84,2156.072 3/86,1188.81
<br />2 1/24,4376.392 1/26,7649.74
<br />2 5/84,5696.5824"2 5/87,40310.66
<br />2 3/44,6876.752 3/47,97211.4830"
<br />2 7/84,7996.912 7/88,52112.27
<br />34,9107.0739,06213.05
<br />3 1/89,60413.83
<br />3 1/410,13914.6
<br />3 3/810,62515.336"
<br />3 1/211,09715.98
<br />3 5/811,56916.66
<br />3 3/412,03517.33
<br />3 7/812,48617.98
<br />412,86118.52
<br />4 1/813,07618.83
<br />4 1/413,28519.13
<br />4 3/813,48619.42
<br />
<br />
<br />Disclaimer:
<br />This sanitary sewer overflow table was developed by Ed Euyen, Civil Engineer,
<br />P.E. No. 33955, California, for County Sanitation District 1. This table is provided
<br />as an example. Other Agencies may want to develop their own estimating
<br />tables.
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